Extension table



S p 1931. 'J. H. TRENKLER ET AL EXTENSION (T'A'BLE Filed May 7. 1929 2 Sheets-Sheet 1 M a a m. N mm W 2 v aw 1 a M L ma ATTORNEY Sept. 22, 1931. J. H. TRENKLER ET AL 1,824,640

ExTENsIo iq TABLE Filed May 7. 1929 2 Sheets-Sheet 2 Patented Sept. 22,: 1931 PATENT-OFF! Joann. 1332mm AND wnnnnn A. June, ornoRNnLL, new YORK nx'rnnsronrmitn 'i" I Ajjniication med IayZZJSZe."Serial No. 361,180.;

The present invention relates to extension tablesfand more p'arti'cularlyto the type m' which a movable top-section is shiftable from a osition under a stationary top section to a. position in a plane with the stationery top sectionor vice verse.

An object ofthe inventlon no tilting movement of the m'ovable top section to .sh'i'ft it toand "from its positionof use. A further 'objctof the invention is to 5 provide a novel ext ension slide fof compact" construction conteiningthe means for con:

trolling the movement of efmoyleble top] S60 t'ion from its inner to its outer positlonlandl w vice versa; 5A still fnrtherobject oi-the ing vention is to provide a novel meansfof causing the simultaneous movement of two' top sections upo'n'the movement o' f one of them to or from .collepsedposition.'- j

To these and othergends, the inventionconmisists of cert-em ties and combinations of:

parts all of which willbehereinafter described: the novel featuresibeing pointed out in the appended claims.

In the drawings;

Fig. 1 'i a ide yiew, 0t stable with "parts Fig. 4 is an inverted view of the inner?v face offone of the movable members; bf exten v sion slide; 4=0

taneous'operati0n';

thecentenmember of en extension slide; showing the manner in which the switch operates between the two guides; and,

I Fig. 7 is a'sectionontheline Q In the illustrated fembo'dimentl of the in-' '50 vention; '1 indicates'a'base' from which rises is toprovide acons'truction which will "be inexpensive to manufacture, simple in operation, an-drlnra.

ble in use. Another obj ectjof the invention" is to providee construction WlllChj requires Fig-dish bottom view of enextension slide showing the means connecting the zmovable members of; an extension slide forsimnl I f I f movements of the-slides fromone parallel Fig. 6 is a- ,fragmentaryfenlerged iew of twopedestals 2 connected at their upper ends by a cross piece 3. In this instance, this'cross piece supports two extension slides each comprising a "center member 43nd two side meIn-' b 3 15 i I -.55

"Each center member4 is, in this instance; stationary being connected to' the cross. JlGCQ' 3 to project from both sides thereof. 7 t its middle portion each center member 4 has an upwardly projecting rest 6 and't stationary top' section 7 isrigidlyv secured to the rests 6 of the center members of the two extension slides. f j c The two movable members or sections 5 of eachextensionslide are provided each with a" restS near itsouter end tojwhich a movable top section 9 "is rigidly secured,there being connected two of such movable sections one. on each extension slide.

theend in view of guiding each mo.v. b

able section 5 on thestationary section 4, o11 e of said sections, in this instance, the station-1 a'ry section is provided with two sets of ways, the sets being 'arienged in difierent horizon-1 tel plane and also at difl'erent points in the length of the slide. Each set, in this instance; comprises a short way 6 and a long way 7 perallel with and below the way 6. .A short junction way 8 connects thetwoweys 6 and 7 at one'end and extendsbeyondsnch ways ina horizontal plane between the two. j

Onthe'twosets of ways on opposite sidesof the center member or'section 4 operate devices 9Iin the form of two projections or rollers on the inner face'of each movable member 5 in 35 diiferent horizontal planes and at different points inthe lengths of the members 5. By heving two sets of waysandtwo projections for each movable member5,-the lettertravels from itsfi-nner to onterposition-or Ivice verse without any tilting movementof the movable; slidemembers 5. Theraisingend lowering tionway between the converging walls 10, this switch 11 being pivoted at 12 and when in one position directing a projection 9 into the upper way 6 and in another position directing a projection into the lower way 7.

To effect the shifting of the movable switch member, a switch shifting means is employed comprising, in this instance, a member which is mounted between the two ways to swing and to slide during such swinging. In this instance, this member has a head portion 12 and a stern portion 13. ,Tlie stem portion 13 is guided in a guide 14 while the head part 12 is provided with a straight slot 15 in'whichlies a fixed pin 16. A spring17 has an abutment an one end against the shifter and its" other end against the guide 14. The head portion of the shifter is so arranged that in one extreme position determined by the slot it projects into the way 6 and in the other extreme position 'itprojects into the way in the path of, a projection 9 travellingon 7 said ways. 'When a projection 9 engages the head portion of the shifter it compresses the spring 17 until the center of the slot 15 1s passed by the pin when the spring 17 ex-' i ands and'projects the shifter into theother way. 4

Connection between the shifter and the switch isefiected, in this instance, through a projection 18 on the shifter operating between two spaced abutments 19 on the switch. As

the switch shifter is moved by a projection 9. it' first moves independently of the switch but upon the expansion of the spring 17 the shifter strikes the other abutment on the switchmember and kicks the switch into the path of the projection 9 travellingtowardthe junction way so that the projection Inust displace the switch beforethe projection enters the unction way, the spring permitting the -yielding of the switch-I but returning the switch immediately to the position to which it is' carried by the shifter. a

Simultaneou'smovement of under side of a center member and having links 22 pivoted at 23-toitsopposite ends and at24 to the outer faces of the slide ;member s vid'ed with guide straps 25 which extend from 5iflThe center 'members may each be'proopposite sidesof the under surface of each center member underthe's de members and upwardly on the outer faces of the side members holding the latter tothe center memberi "In operation, assuming that the top emu si'ons' lie beneath the fixed top,,as shown in r 1', and it is'desired' toextend the table a'tthis time the projections 9 lie in the'ways 7 and the switch shifters project into such wayskgone of the top extensions is pulled outwardly and the projections 9 travel in the r tuner the switch shifters are engaged,

r the twotop ex--, tension members in opposite directions'may' beefiected by providing each center member] shifting the switches into the path of the projections 9 before the junction ways are reached. As the projections 9 engage the switches, the latter yield and spring back into the paths of the projections. When the projections reach the junction ways the top extensions are lying beyond the outer sides of the top so thattheextensionsa're required to be'moved toward the top and in doing this the projections 9 are directed by the switches into upp r Way 6.0. .azrhich th y. travel unti the top extensions abut at their inner edges theioilteriledges of the fixed top as shown in dotted li nes in Fig. 1 To move the top extensions to their'inner positions, the top extensions are again pulled outwardly until the switches are shifted andare then moved inwardly to positions beneath the fixed top.-

What we claim as our invention and desire to secure byv Letters Patent is: I r

1. The combination with a table top and a top extension, of an extension slide including two members one rigid with the top and the other rigid with the top extension, one of said slide members having two sets of ways at different points in the length of the member and also in differenthorizontal planes, each of said sets comprising two parallel ways and ajunction way between them, and the other of said slide members having two projections atdiflierentf points in' the length of the'member and also in different horizontal" plane s,each of said projections operating on one of said ways andse'rving to holdjthe top extension against tilting in the movement of said top extension from anfinner position under the top to an outer positionin the plane of the top or vice versa, v

2. The combination with a table top and a top extension, of an extension slide'including two members, one of which is provided movable switch shifting means for shifting.

the switch so thatthe projection is directed to travel alternatelyi on the "two ways when carried to the junction point,'said means hav ing portions alternately projected .inte the two ways by the projection. I

8. The combination with a table top and a top extension, of an extension slideincluding two members, one 'of which is provided with two parallel ways connected at one end, a projection carriedby the other slide member and operating in said ways, and means alternately projected into the path ofthe projection so asto direct the projection alternately into the two ways on, successive movements of the projection to thefjunction betw enftne ways.

two parallel ways connected at one end, a projection carried by the other slide member and operating in said ways, a movable switch at the junction of the ways, and a movable switch shifter mounted to be projected into the path of the projection as it travels along either way and connected to the movable switch to shift the latter as theprojection ap- V proaches the junction on one way to direct the projection into the other way from said junction point. 5. The combination with a table top and a top extension, of an extension slide including two members, one of which is provided with two parallel ways connected at one end, a projection carried by the other slide member and operating in said ways, a pivoted switch at the junction point of the ways having two spaced abutments, a slidable swinging switch shifter arranged to operate between the two abutments on the switch and to be projected into the path of the projection travelling on either way, and a spring acting on the switch shifter to hold it in either of its positions and means embodying a projection on one of the alternately in different horizontal planes.

JOHN H. TRENKLER. WARREN A. KING.

to permit the switch to yield in order that the projection may pass the switch after shifting the latter so as to reach the junction way to pass to the other way.

6. The combination with a fixed table top and two top extensions, of an extensionslide including three members, one rigid with the top and the other two movably arranged on opposite sides of and movable on the first mentioned member but each rigid with one of the top extensions, the member rigid with the top having on opposite sides thereof two ways and a junction way connecting them at one of the ends, a device carried by each of the slide members on the top extensions and operating in one of the ways tosupport a top extension in a plane with the top and in the other way to support a top extension under the top, and equalizing means connecting said movable members for movement in opposite directions.

7. The combination with a table top and a top extension, of an extension slide including two members, one of which is provided with two parallel ways connected at one end, a pro jection carried by the other slide member and operating in said ways, a movable switchat the junction of the ways, and a shifter having connection with the switch for effecting the movement of the switch alternately in opposite directions to direct said projection to travel alternately on the two ways when it reaches the junction between them.

8. In a table, the combination with a stationary top and a top extension, of an extension slide embodying two members, one of which is rigidly secured to the top and the other of which is rigidly secured to the top 7 extension, and means between the two slide members for guiding them in two horizontal planes one above the other, said guiding 

